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From "Thomas Weise (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (APEXCORE-78) Pre-Checkpoint Operator Callback
Date Fri, 08 Jan 2016 20:49:40 GMT

     [ https://issues.apache.org/jira/browse/APEXCORE-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Weise resolved APEXCORE-78.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 3.3.0

> Pre-Checkpoint Operator Callback
> --------------------------------
>
>                 Key: APEXCORE-78
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-78
>             Project: Apache Apex Core
>          Issue Type: Improvement
>            Reporter: Thomas Weise
>            Assignee: Pramod Immaneni
>             Fix For: 3.3.0
>
>
> There are situations when the operator developer would like to implement certain logic
to be executed just before the operator gets checkpointed. For example, flush file to HDFS.
This can be done in endWindow, but then it executes unnecessarily even when it's not a checkpoint
window. This can be a significant optimization for expensive operations such as HDFS flush.



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